Bottled water is likely a factor in rising rates of tooth decay in preschoolers, says a new report from U.S. Centers for Disease Control and Prevention.

Dr. Randall Croutze, an Edmonton dentist, said more people are drinking bottled water that doesn't contain fluoride, which works to prevent cavities. Croutze recommended drinking tap water to prevent cavities.

"It's an extremely low dose of fluoride in the water and it's only beneficial for the strong development for enamel," Croutze said.